<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <form action="">
        用户名：
        <input type="text" name="">
        <br>
        密码：
        <input type="password" name="">
        <br>
        <button type="submit">提交</button>
        <button type="reset">重置</button>
        <button type="button">普通按钮</button>
    </form>
</body>

</html>